Thanks 10e, good to know that I didn't screw up my monitors factory default menu. I only press the top and second button, so I don't think I mess up anything.

I did a little comparison, comparing a 2412 vs a 2311, the w-led seems have a brighter view. I also notice the w-led to have darker color on dark and brighter color on bright. And during movies, the ccfl panel give a more redish/blush on face vs a more paled/white on the w-led.

Maybe it's 2 different panels? Now I am just waiting for the spider pro 3 to go on sale again.